Duster for brick-machines



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C. CHAMBERS, 1r. Duster for Brick Machines.`

Patented 1an.l 24. 1865.

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UNITED STATES PATENT GFFICE.

DUSTER. FOR BRICK-MACHINES.

Specification forming part of Letters Patent No. 4 5,974, dated January24, 1365.

.To all whom it may concern:

Be it known that I, CYRUs CHAMBERS, Jr., of the city of Ihiiadelphia, inthe State of Pennsylvania, have invented a new and Improved Duster forBrick-Machines 5 and I do hereby declare the following to be a full andcorrect description of the same, reference being had to the accompanyingdrawings, in which- Figure l is a central longitudinal vertical sectionof the duster with bricks passing through it on an endless apron. Fig. 2is a vertical transverse section of the same through the cone shaft.Fig. 3 is a plan or top view of the same. Fig. 4 is a perspective viewof the hollow cones with a brick passing between them.

The same part is marked by the same letter iloors or sheds for drying.

It consists in placing over such an endless apron or conveyer a box orchamber, in which sand or dust is kept constantly in suspension, so thatthe bricks, as they pass through said chamber,become thoroughly coveredon every side with the suspended sand or dust. This coating renders themmuch nicer to handle, prevents their adhering together in the barrows orthe hack, and improves their color when burned.

To enable others to make and use my dustin gm achine,I will proceed todescribe its construction and operation, referring to the drawings, inwhich- A marks the frame, with the endless apron B and the rollers C onwhich it moves. This endless apron receives the bricks from the machineand carries them to the point where the off-bearers remove them anddeposit them in thehacks. Itmaybeofanindenite length. At any point thatmay be preferred in the' length otl this apron the dusting-machine maybe placed. 'lt consists of a box or chamber surmounted by a reservoir orhopper, from which dust or sand is constantly supplied, and by meansot'two hollow concs kept constantly in suspension in the chamber andthrown upon every side ot'thebricks as theypass through it.

In entering the chamber and leaving it the bricks D D pass under thecurtains S and through the end boxes, F F, which project from either endof the main chamber H and are lower and smaller than that chamber. Abovethe chamber H is the reservoir or hopper G, in which the sand or dust isdeposited, and from which it is supplied to the chamber below. Indescending it passes through the narrow portion J of the hopper, whicehas an inclined bottom, which directs the sand onto the cone-shaft N.

The feed is regulated by means of the slides K, and the dust is keptfrom clogging by the stirring-ams M, attached to the stirrer-shat't L,which keep the materials in the hopper in constant agitation.

The position and construction ot' the hollow cones P is clearly shown inFigs. 2 and 4. They are attached to and revolve with the shaft N, whichhas the friction-wheel R on its outer end, receiving motion from thewheel Q on the end of stirrershaft L. The lrases ot' the cones are opentoward the middle of the chamber H, and their interior surfaces areslatted or corrugated, as shown.

The concave or trough T conducts the sand or dust toward the interiorapex ot' the cones, whence it is directed downward upon the top, sides,and ends of the bricks as they pass through the chamber H. The slats son the interior of the concs, striking the particles as theydescend,scatter them in all directions, and keep the interior of chamberH constantly filled with sand or dust in suspension in the air, so thatthey adhesive surface of the green brickbecomes thoroughly coated withthem as it passes through the chamber. The curtains S prevent the escapeof dust without impeding the passage of the bricks. The surplus dust orsand that is not carried out by the bricks or apron isv caught on aninclined table or board under the belt and conveyed to a receptaclebelow, from whence it is again ied to the hopper.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. Applying sand or dust to the surface of undried bricks iu a chamberin which those materials, or either of them, are kept in suspension bymechanical means.

2. Passing bricks as theycomefrcma brickmachine through a box or chamberin which sand or dust is kept iu suspension by me chemical means,substantially in the manner and for the purpose described.

3. The use, in a dusting apparatus, of the cones P, constructed andoperating substantially as described, for giving direction to currentsof santi or dust, for the purpose specified. The above specification ofmy said invention sigrei and witnessed, at Philadelphia, this 3d day ofDecember, A. D. 1864.

t CYR-US CHAMBERS, JR. t 'Witnessesz THORWALD G11. DAMBORG, Jol-1N T,CHAMBERS.

